Added year, hour, minute methods
added a utc timestamp
fixed the utcTimestamp
Merge branch 'utcTimeStamp' of https://github.com/SinnerSchraderMobileMirrors/nsdate-helper into SinnerSchraderMobileMirrors-utcTimeStamp
Merge branch 'SinnerSchraderMobileMirrors-utcTimeStamp' into develop
DRYs up use of initializeStatics (use +sharedCalendar and +sharedDateFormatter instead of _calendar, etc)